PuSH - Publikationsserver des Helmholtz Zentrums München: High levels of eukaryotic Initiation Factor 6 (eIF6) are required for immune system homeostasis and for steering the glycolytic flux of TCR-stimulated CD4<sup>+</sup> T cells in both mice and humans.

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Manfrini, N.* ; Ricciardi, S.* ; Miluzio, A.* ; Fedeli, M.* ; Scagliola, A.* ; Gallo, S.* ; Brina, D.* ; Adler, T. ; Busch, D.H.* ; Gailus-Durner, V. ; Fuchs, H. ; Hrabě de Angelis, M. ; Biffo, S.*

High levels of eukaryotic Initiation Factor 6 (eIF6) are required for immune system homeostasis and for steering the glycolytic flux of TCR-stimulated CD4⁺ T cells in both mice and humans.

Dev. Comp. Immunol. 77, 69-76 (2017)

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Eukaryotic Initiation Factor 6 (eIF6) is required for 60S ribosomal subunit biogenesis and efficient initiation of translation. Intriguingly, in both mice and humans, endogenous levels of eIF6 are detrimental, as they act as tumor and obesity facilitators, raising the question on the evolutionary pressure that maintains high eIF6 levels. Here we show that in mice and humans, high levels of eIF6 are required for proper immune functions. First, eIF6 heterozygous (het) mice show an increased mortality during viral infection and a reduction of peripheral blood CD4(+) Effector Memory T cells. In human CD4(+) T cells, eIF6 levels rapidly increase upon T-cell receptor activation and drive the glycolytic switch and the acquisition of effector functions. Importantly, in CD4(+) T cells, eIF6 levels control interferon-γ (IFN-γ) secretion without affecting proliferation. In conclusion, the immune system has a high evolutionary pressure for the maintenance of a dynamic and powerful regulation of the translational machinery.

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PuSH - Publikationsserver des Helmholtz Zentrums München

High levels of eukaryotic Initiation Factor 6 (eIF6) are required for immune system homeostasis and for steering the glycolytic flux of TCR-stimulated CD4+ T cells in both mice and humans.

High levels of eukaryotic Initiation Factor 6 (eIF6) are required for immune system homeostasis and for steering the glycolytic flux of TCR-stimulated CD4⁺ T cells in both mice and humans.